Adjustable safety assembly of a nail driver

ABSTRACT

An adjustable safety assembly of a nail driver comprises a safety rod; an adjusting wheel; a resisting rod; a screw rod passing through the safety rod, adjusting wheel, and resisting rod sequentially; the screw rod being at a front end and the resisting rod being at a rear end; and a retaining seat having an open section; the adjusting wheel being position in the open section; and the screw rod passing through the retaining seat; When the adjusting wheel is rotated, the adjusting wheel moves in the open section of the retaining seat along a thread of the screw rod so as to drive the safety rod to achieve the effect of adjusting the position of the safety rod. The adjusting wheel is installed at a position far away from the beating opening so that the mistake in adjustment is reduced.

FIELD OF THE INVENTION

The present invention relates to nail drivers, in particular to anadjustable safety assembly of a nail driver, wherein the safety assemblycan be adjusted easily and the volume is smaller.

BACKGROUND OF THE INVENTION

Nail drivers have become a necessary device in various works, such asbuilding, decoration, mechanics, etc. However the safety assembly is animportant part in the nail driver.

In the prior art of the safety assembly of a nail driver, an enclosingportion is installed at a front end of the safety assembly of a naildriver and an adjusting seat is combined to a pivotal portion by threadconnection. Thereby the adjusting seat can telescopically move along theenclosing portion so as to achieve the object of adjust the safetyassembly of the nail driver.

In above mentioned prior art, although the safety assembly of the naildriver is adjustable, but since the enclosing portion is installed at afront end of the nail driver, it is adjacent to the beating opening ofthe nail driver. Not only the volume of the beating opening is enlargedgreatly, but also the operation is not convenient or the nail drivercannot be used at a narrow space. More importantly, since the adjustingseat of the safety assembly is installed at the beating opening, it ispossible the safety assembly will be actuated by mistake so as to causean undesired accident.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to providean adjustable safety assembly of a nail driver, wherein the safetyassembly can be adjusted easily and the volume is smaller. In thepresent invention, an adjusting wheel is used to control the safetyassembly. No more element is installed at the front end of the screw rodnear the beating opening so that the volume is smaller. Furthermore, theadjusting wheel is installed at a position far away from the beatingopening so that the mistake in adjustment is reduced. Thereby theretaining seat encloses the adjusting wheel, only a part of theadjusting wheel for adjustment protrudes out so that the destroy of thesafety assembly is reduced greatly and thus the lifetime is prolonged.

To achieve above objects, the present invention provides an adjustablesafety assembly of a nail driver which comprises a safety rod; anadjusting wheel; a resisting rod; a screw rod passing through the safetyrod, adjusting wheel, and resisting rod sequentially; the screw rodbeing at a front end and the resisting rod being at a rear end; and aretaining seat having an open section; the adjusting wheel beingposition in the open section; and the screw rod passing through theretaining seat; When the adjusting wheel is rotated, the adjusting wheelmoves in the open section of the retaining seat along a thread of thescrew rod so as to drive the safety rod to achieve the effect ofadjusting the position of the safety rod. The adjusting wheel isinstalled at a position far away from the beating opening so that themistake in adjustment is reduced.

The various objects and advantages of the present invention will be morereadily understood from the following detailed description when read inconjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded schematic view of the present invention.

FIG. 2 is a schematic view of the adjustable safety assembly of a naildriver of the present invention, wherein the safety assembly is in aprolong state.

FIG. 3 is a schematic view of the adjustable safety assembly of a naildriver of the present invention, wherein the safety assembly is in areducing state.

FIG. 4 is a cross sectional view of the adjustable safety assembly of anail driver of the present invention which is in a triggering andprolong state.

FIG. 5 is a cross sectional view of the adjustable safety assembly of anail driver of the present invention which is in a triggering andreducing state.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand thepresent invention, a description will be described in the following indetails. However, these descriptions and the appended drawings are onlyused to cause those skilled in the art to understand the objects,features, and characteristics of the present invention, but not to beused to confine the scope and spirit of the present invention defined inthe appended claims.

Referring to FIGS. 1 to 3, the safety assembly of a nail driver of thepresent invention is illustrated. The present invention has thefollowing elements.

A retaining seat 20 is retained to a trigger 10 of a nail driver body 1.The retaining seat 20 has an approximate cylinder shape. A front endthereof is opened and a rear end thereof is closed. A rear end is formedwith a receiving groove 21. An elastic unit 211 is received in theretaining seat 20. A middle section of the retaining seat 20 is formedas an open section 22.

An adjusting wheel 30 has a screw hole 31 at a center portion thereoffor receiving a screw rod 40. A width of the opening section 22 of theretaining seat 20 is wider than an adjusting wheel 30 for receiving theadjusting wheel 30.

A screw rod 40 passes through the screw hole 31 of the adjusting wheel30.

A safety rod 50 has a press portion 51 at a front end thereof. The pressportion 51 is at a beating opening 11 of the nail driver body 1 forresisting a working wall. A rear end of the safety rod 50 has a throughhole 52.

A resisting rod 60 has a positioning portion 61 at a front end thereof.The screw rod 40 passes through a via hole in the positioning portion61. A ring 62 serves to position the screw rod 40 so that the resistingrod 60 is combined and interlinked with the screw rod 40. A rear end ofthe resisting rod 60 is curved as a resisting portion 63. When theresisting rod 60 reduces inwards, the resisting portion 63 serves toresist against an ejecting sheet 12 of the trigger 10.

In assembly, a front end of the screw rod 40 passes through the throughhole 52 of the safety rod 50, the screw hole 31 of the adjusting wheel30, and the via hole of the resisting rod 60. A elastic spring 63sleeves an upper portion of the screw rod 40 and resists against anupper side of the through hole 52 of the safety rod 50 and the ring 61is installed between a lower side of the screw rod 40 and the elasticunit 211. The elastic unit 211 is received in the receiving groove 21 ofthe retaining seat 20. The adjusting wheel 30 is received in the openingsection 22 of the retaining seat 20.

Thereby when the press portion 51 at the front end of the safety rod 50resists against a working piece and a force is applied thereon, thesafety rod 50 will retract to drive the adjusting wheel 30 and the screwrod 40 so that the resisting rod 60 reduces inwards and the resistingportion 63 of the resisting rod 60 will resist against the ejectingsheet 12. When the trigger 10 is triggered, the ejecting sheet 12 willdrive the trigger switch 13 so as to trigger a nail. When the pressureapplied to the press portion 51 of the safety rod 50 is released, theresisting rod 60 is pushed by the elastic unit 211 in the retaining seat20 to separate from the ejecting sheet of the trigger 10. Theinteraction of the safety rod 50 and the trigger 10 are known in theprior art and thus the details will not be further described herein.

Referring to FIGS. 2 to 5, the adjustment of the present invention willbe described herein. When the adjusting wheel 30 is rotated, theadjusting wheel 30 will move forwards and backwards in the open section22 of the retaining seat 20 along a thread of the screw rod 40. When theadjusting wheel 30 moves forwards, as shown in FIG. 2, the through hole52 of the safety rod 50 will adhere to the adjusting wheel 30 to moveforwards therewith. Thus, the safety rod 50 protrudes. In this state, ifa front end of the safety rod 50 is pressed downwards and the triggerswitch 13 is pressed, as shown in FIG. 4, the resisting portion 63 ofthe resisting rod 60 will buckle the ejecting sheet 12 so as to have thefunction of triggering.

If it is necessary to reduce the safety rod 50, the adjusting wheel 30can be rotated to move backwards, as shown in FIG. 3, when the adjustingwheel 30 move backwards. The through hole 52 of the safety rod 50 ispushed by the elastic spring 53 so as to retract with the adjustingwheel 30. Then the press portion 51 at the front end of the safety rod50 is retracted to a position behind that illustrated in FIG. 2. Thus,the safety rod 50 can be adjusted easily. In this state, if the frontend of the safety rod 50 is pressed downwards and the trigger switch 13is pressed, as shown in FIG. 5, the resisting portion 63 of theresisting rod 60 will buckle the ejecting sheet so as to have thefunction of triggering.

The present invention is thus described, it will be obvious that thesame may be varied in many ways. Such variations are not to be regardedas a departure from the spirit and scope of the present invention, andall such modifications as would be obvious to one skilled in the art areintended to be included within the scope of the following claims.

What is claimed is:
 1. An adjustable safety assembly of a nail drivercomprising: a safety rod; an adjusting wheel; a resisting rod; a screwrod passing through the safety rod, adjusting wheel, and resisting rodsequentially; the screw rod being at a front end and the resisting rodbeing at a rear end; a retaining seat having an open section; theadjusting wheel being positioned in the open section; and the screw rodpassing through the retaining seat; wherein when the adjusting wheel isrotated, the adjusting wheel moves in the open section of the retainingseat along a thread of the screw rod so as to drive the safety rod toachieve the effect of adjusting the position of the safety rod.
 2. Theadjustable safety assembly of a nail driver as claimed in claim 1,wherein the screw rod has a through hole and is installed at the frontend of the screw rod; an elastic unit is installed between the safetyrod and the safety rod so that the safety rod is adhered to theadjusting wheel.
 3. The adjustable safety assembly of a nail driver asclaimed in claim 1, wherein a front end of the safety rod has aresisting portion; the resisting portion is installed at a beatingopening; when the resisting portion is pressed inwards, the safety rodwill cause the resisting rod to reduce inwards to have a state oftriggering.
 4. The adjustable safety assembly of a nail driver asclaimed in claim 1, wherein one end of the resisting rod is formed witha resisting portion for resisting an ejecting sheet of a trigger so asto control the triggering of the trigger.
 5. The adjustable safetyassembly of a nail driver as claimed in claim 1, wherein one end of theretaining seat has an elastic unit for resisting against the resistingrod so that when no force is applied, the trigger can not be actuated.